Yanmar 1GM10 Operation Manual page 63

Inspecting the Zinc Anode
The inspection intervals and replacement
schedule for the zinc anode are determined
by seawater characteristics and your
operating environment. Inspect the zinc
anode a minimum of every 300 hours of
operation, but shorten this interval if your
operating conditions show a higher
corrosion rate.
Replace the zinc anode when its surface
area has been reduced to less than half of
its original size.
If neglected, seawater will begin to react with
the internal surface areas of the engine
cooling system. This will lead to seawater
leaks, internal corrosion and eventual failure
of engine components.
The zinc anode is located on the inside of
the anode plug and is labeled "Anticorrosion
Zinc."
Cleaning the Intake Silencer (Air
Cleaner)
1. Open the clamps that secure the air
cleaner cover.
2. Remove the air filter element.
3. Wash the air filter element with a mild
neutral detergent and water.
4. Allow the element to dry completely.
5. Remove any debris from the filter
housing and cover.
6. Reinstall the filter element and secure
the cover with the clamps.
GM Series Operation Manual
Cleaning the Exhaust / Water Mixing
Elbow
The mixing elbow is attached to the exhaust
manifold. The exhaust gas is mixed with
seawater in the mixing elbow.
1.
2.
3.
4.
5.
Cleaning the Breather Pipe
See your authorized Yanmar Marine dealer
or distributor.
Checking and Adjusting the
Alternator V-Belt Tension
See Checking and Adjusting the Alternator
V-Belt Tension on page 51.
Checking the Wiring Connectors
See your authorized Yanmar Marine dealer
or distributor.
Inspecting and Adjusting the
Intake / Exhaust Valve Clearances
See Inspecting and Adjusting the
Intake / Exhaust Valve Clearances on page
51. See your authorized Yanmar Marine
dealer or distributor.
Inspecting and Adjusting the
Throttle and Shift Control Cables
See Inspecting and Adjusting the Throttle
and Shift Control Cables on page 51.
© 2007 Yanmar Marine International
PERIODIC MAINTENANCE
Remove the mixing elbow.
Clean dirt and scale out of the exhaust
and seawater passages.
If the mixing elbow is damaged, repair
or replace it. See your authorized
Yanmar Marine dealer or distributor.
Inspect the gasket and replace if
necessary.
Replace the mixing elbow with a new
one every 500 hours or two years,
whichever comes first, even if no
damage is found.
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